Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 9, Pages 2638-2642Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201409412
Keywords
2D materials; carboxylate ligands; liquid exfoliation; surface functionalization; transition-metal dichalcogenides
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Funding
- European Union [FP7-333948]
- Science Foundation Ireland [SFI/12/RC/2278]
- German research foundation DFG [BA 4856/1-1]
- SFI [PI_10/IN.1/I3030]
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Layered two-dimensional (2D) inorganic transition-metal dichalchogenides (TMDs) have attracted great interest as a result of their potential application in optoelectronics, catalysis, and medicine. However, methods to functionalize and process such 2D TMDs remain scarce. We have established a facile route towards functionalized layered MoS2. We found that the reaction of liquid-exfoliated 2DMoS(2), with M(OAc)(2) salts (M=Ni, Cu, Zn; OAc=acetate) yielded functionalized MoS2-M(OAc)(2) materials. Importantly, this method furnished the 2H-polytype of MoS2 which is a semiconductor. X-ray photoelectron spectroscopy (XPS), diffuse reflectance infrared Fourier transform spectroscopy (DRIFT-IR), and thermogravimetric analysis (TGA) provide strong evidence for the coordination of MoS2 surface sulfur atoms to the M(OAc)(2) salt. Interestingly, functionalization of 2H-MoS2 allows for its dispersion/processing in more conventional laboratory solvents.
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